Question 1

Which of the following best describes a dehydration reaction in the formation of polymers?

Accepted Answer

A reaction where monomers are joined together by removing a molecule of water.

Question 2

What is the general formula for a hexose monosaccharide?

Accepted Answer

$$C_6H_{12}O_6$

Question 3

Which of the following is a correct example of a disaccharide and its monomer components?

Accepted Answer

Sucrose: glucose + fructose

Question 4

Why do lipids store more energy per gram than carbohydrates?

Accepted Answer

Lipids have a higher ratio of carbon and hydrogen to oxygen, resulting in more energy-rich bonds.

Question 5

Which of the following is NOT a function of lipids in living organisms?

Accepted Answer

Catalyzing chemical reactions

Question 6

A cow relies on a fungus in its digestive system to break down cellulose. What would happen if the fungus was absent?

Accepted Answer

The cow would be unable to digest cellulose and could die.

Question 7

Which of the following best explains why hydrocarbons are hydrophobic?

Accepted Answer

Hydrocarbons have nonpolar covalent bonds and lack significant oxygen atoms.

Question 8

Which carbohydrate is used for long-term energy storage in animals?

Accepted Answer

Glycogen

Question 9

What is the ratio of hydrogen to oxygen in carbohydrates?

Accepted Answer

$$2:1$$

Question 10

Which of the following is a structural carbohydrate found in fungal cell walls?

Accepted Answer

Chitin

Question 11

Which of the following is a correct formula for a pentose monosaccharide?

Accepted Answer

$$C_5H_{10}O_5$

Question 12

Which of the following statements about polysaccharides is TRUE?

Accepted Answer

Polysaccharides are long chains of monosaccharides joined by dehydration reactions.

Question 13

Which linkage type holds together the polymer chitin?

Accepted Answer

Beta ($$\beta) $$linkages

Question 14

Which of the following is a correct example of a modified complex carbohydrate?

Accepted Answer

Cellulose with an added amino group forming chitin

Question 15

Which of the following is NOT a function of carbohydrates in living organisms?

Accepted Answer

Waterproofing

Question 16

Which of the following best explains why plants can store energy as carbohydrates while animals prefer lipids?

Accepted Answer

Plants do not move, so they do not need to minimize weight for energy storage.

Question 17

Which of the following is a correct example of a lipid formula?

Accepted Answer

$$C_{16}H$$_{32}$$O_2$$

Question 18

Which of the following is a function of lipids that helps animals survive in cold environments?

Accepted Answer

Insulation

Question 19

Which of the following is a correct statement about hydrolysis?

Accepted Answer

Hydrolysis breaks polymers into monomers by adding water.

Question 20

Which of the following organisms uses lipids as toxins for defense?

Accepted Answer

Monarch butterfly

Organic Building Block Molecules: Carbohydrates and Lipids

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